deletions | additions       diff --git a/Version3.tex b/Version3.tex  index 0fef391..06e897c 100644  --- a/Version3.tex  +++ b/Version3.tex 
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$$  \sum_{i=0}^{n-1} f_2(n,i) = \frac{d}{6}n^3 + (\frac{c+d}{2})n^2 + (\frac{c+d}{2})n \\  \therefore \\  T(n) =\sum_{i=0}^{n-1} f_2(n,i) =  \frac{d}{6}n^3 + (\frac{c+d}{2})n^2 + (b + \frac{c+d}{2})n + a \\ $$  Estimating constants: 
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Finally, substitute constants:  $$  T(n) = $$